http://www.youtube.com/watch?v=tG5NX7fC8VM
Red is not the smartest color for a kayak. The more scared you get they can feel your hearbeating threw your kayak. even with a SOT rotomolded yak. If they sense a a change in impulses form your heartbeat, they get interested.
the guy paddling away, with the red kayak looked to the shark, like a hurt seal bleeding and strugling to swim away. so he went in for the swoop and got a mouthfull of wood.
If you paddle away fast when you see one, you could trigger an attack, the shark is checking you out to see if you might be food, if you decide to book it your giving the shark the impression your scared of it, like a Seal would be. That explains the incident where the shark followed those other 2 kayakers.
the Oil Rig paddler wasnt even hit hard. If they are gonna attack you, they are gonna hit you hard to try a injur you badly.. If that guy was victum of the first assualt he woulda been tossed out of that kayak a couple feet in the air.
That real popular video of the Huge Mako shark chompin on a seal at Catalina taken a month ago you can kinda see thier seal killing procedure.
http://www.youtube.com/watch?v=6OP7B22cV2g
http://www.youtube.com/watch?v=WnylC6SE9fU shorter close up version.